Lock.



A. ARENS.

LOCK.

APPLICATION FILED MAR. 2, 1912.

Patented Aug 12, 1913.

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LOOK.

APPLICATIQN FILED MAR. 2, 1912. 0 I 1,070,098, Patented Aug. 12, 1913.

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UNITED STATES PATENT OFFICE.

AUGUST ARENS, OF NEW BRITAIN, CONNECTICUT, ASSIGNOR TO THE AMERICANHARDWARE CORPORATION, OF NEW BRITAIN, CONNECTICUT, A CORPORATION OFCONNECTICUT.

LOCK.

Specification of Letters Patent.

Patented Aug. 12,1913.

To all whom it may concern:

Be it known that I, AUGUST Alums, a citizen of the United States,residing at New Britain, Hartford county, State of Connectiout, haveinvented certain new and useful Improvements in Locks, of which thefollowing is a full, clear, and exact description.

This invention relates .to locks, and particularly to looks adapted foruse on corridor doors of hotels, office buildings and the like. In itsbroad aspect, it contemplates the use, in connection with a latch boltoperable by a knob spindle and independently by a key or keys from theexterior, of means whereby a certain other exterior key or keys maydeadlock said latch bolt against retraction from the exterior by theknob spindle and the first mentioned key or keys. It is often desirableto shut or look out access from the exterior of an apartment or officeso that no person except the one possessing the certain other key orkeys may enter the locked out apartment from the exterior. Such anoccasion is illustrated in the case of a proprietor of a hotel or oflicebuilding who desires to shut out a tenant who has not paid his rent orhotel bill.

The invention further contemplates the use in combination with the meansjust described, of a device for dead-locking the latch bolt from theinside of the apartment against entrance from the exterior through theknob spindle and through the first named key or keys hereinbeforementioned. My lock is so devised, however, that the retraction of thelatch bolt from the outside by the certain other key or keys mentioned,which for convenience I will term shutout key or keys, is not preventedby the dead-locking of the latch bolt fro-1n the inside, the shut-outkey being designed to dead-lock the latch bolt or retract saiddeadlocking means under all circumstances.

A further object of the invention is to prevent the accidentaldead-locking of the latch bolt while the door is open so that damage tothe lock by closing or slamming the door with the latch bolt deadlocked,is prevented.

These and other advantages will be more fully described in the followingspecification and in the accompanying drawings forming part thereof andillustrating a preferred mbodiment of my invention.

In the drawings, Figure 1 is a front elevation of the assembled lockwith the front cover plate with its tumbler barrel removed, and with theparts in the position they occupy when the door is closed, thedead-locking slide being shown in retracted position. Fig. 2 is a frontend elevation of the lock. Fig. 3 is a fragmentary front elevationshowing the dead-locking slide in bolt-locking position. Figs. 4 and 5are respectively end elevation and top plan views of the dead-lockingslide. Figs. 6, 7 and 8 are views in rear elevation of the tumblerbarrel illustrating the roll-back arm thereof in various positions.Figs. 9, 10, 11 and 12 are elevations respectively of the change key,master key, grand-master key and shutout key. Fig. 13 is a fragmentaryview in elevation showing the escutcheo-n plate with its tumbler barreland indicator button. Fig. 14: is a fragmentary sectional viewillustrating one form of connection between the thumb turn and indicatorbutton.

Referring to the drawings by numerals, 1 indicates the lock case, 2 theface plate thereof and 3 the main latch bolt. of usual construction.

4 indicates the hub of the knob spindle (not shown), which hub carriesroll-back arms 5 as usual adapted to be actuated by the turning of theknob. These roll-back arms bear against a spring pressed yoke 6 adaptedwhen moved by said arms to engage an abutment 7 formed on the end of thelatch bolt 3, and retract said latch bolt.

8 indicates the usual night latch pins connected by the walking beam 9and actuating the latch 10 to dog the roll-back of the outer knobspindle in the usual manner.

In order to dead-lock the latch bolt 3 against retraction, I haveprovided what I term a dead-locking slide in the form of slidingplatell, the movement of which in either direction is limited by stoplugs 12 in the look case 1. This locking slide 11 is suitably guided inthe lock case and at its lower end is provided with .a dead-lockingshoulder 13 which, when the slide is moved downwardly from the positionshown in Fig. 1 to that shown in Fig. 3, is moved in the rear of thelatch bolt 3 and forms an abutment engaging its rear end, thuspreventing its retraction. Adjacent the edge of the case andintermediate its ends, the slide 11 is formed with a recess 14;inclosing a pin or stud 15 upon which is mounted an anti-friction roller16. Upon the face of the slide 11. adjacent this pin is mounted apivoted pawl 17 engaged by a spring 18 and normally pressed against thefriction roller 16 thereby. The inner edge of the pawl which bearsagainst this friction roller is formed with a bevel 19, its oppositeouter edge being provided with a projecting portion forming in effect acam face 20. As a means for retaining this slide in b0ltlocking andunlocking positions, its outer edge is formed intermediate its ends witha toothed detent 21 on either side of which the lower edge of the slideis cut away to form ledges 22 overlying and retaining in a suitable seatformed in the lock case a leaf s iiring 23. This spring is provided withan inwardly projecting V-shaped teeth 23 adapted to engage with thetoothed detent 21. This detent, when the slide is actuated to eitherposition, is adapted to snap over this projection and rest on one sideor the other thereof, this position marking the limit of movement ineither direction and the slide being held in such position by thepressure of the springtooth 23 against a face of the detent 21. Toprovide for the actuation of this locking slide 11 into boltlocking andunlocking position from the interior of the door, I employ a thumb turn(not shown) whose spindle 2 1: carries a hub 25 provided at its end witha roll-back arm 26 operating within a recess 27 formed in the inner edgeof the slide 11 adjacent its upper end, and adapted to bear against theadjacent face of the slide to move it downwardly and upwardly intobolt-locking and unlocking position. The hub 25 also carries at its end,opposite the roll-back arm 26, a locking flange 28 whose purpose will behereinafter explained. Beneath the flange 28 the hub is formed with flatsurfaces 20 All against which bears a leaf spring 30 suitably retainedin the case and designed to hold the hub in either of its turnedpositions. In order to indicate to a person on the exterior of the doorthat the latch bolt has been dead-locked from the inside, I prefer toconnect the forward end of the hub 25 with an indicator button 31mounted on the escutchcon plate of the lock case. I have not illustratedany specific construction of indicator button and connections therewithas the type is well known in the art.

In order to prevent the accidental deadlocking of the main latch boltthrough the thumb turn while the door is open, I provide an auxiliarylatch bolt 32 slotted to slide in the lock case. A spring 33 is suitablyheld in the lock case and has its upper ends bearing against theopposite ends of this auxiliary latch bolt 32 as illustrated, andnormally tends to project the end of the bolt. lV hen the door isclosed, however, the end of the bolt hits against the blank face of thestriking plate secured to the jainb of the door and is held retractedagainst the tension of this spring. As this feature is old and wellknown in the art, I have not deemed it necessary to illustrate it. Atits upper end, the latch bolt 32 is provided with a stud 84 and a slot35. A post 36 is mounted in the lock case 1 to lie within the slot 35and extends above the face of the bolt 32, serving as a hub for adogging rock arm 87 one end of which is slotted at 38 to engage the stud3 1 of the bolt, and the other end of which extends out ardly and isformed at its end with a dogging flange which, when the bolt isretracted, is drawn downwardly but which, when the door is open and thebolt is projected by its spring, is rocked upwardly, as shown in dottedlines in 1 f the drawings, to bring its dogging flange 39 against and inthe path of upward movement of the flange 28 of the thumb turn hub 25,thereby preventing the hub from being rocked to move this flangeupwardly and the roll-back 26 downwardly to move the locking slide 11into bolt-locking position.

I have heretofore stated that when the latch bolt is dead-locked by theslide 11, it cannot be operated from the exterior either by the knobspindle or by a certain exterior key or keys named, but that it can beoperated from the exterior by a certain other key or keys which I havetermed shut-out keys, this last named form of key being designed tooperate from the exterior even when the locking-bolt has been irojeetedfrom the interior, the parts being so constructed and arranged that whenthe door is locked from the exterior by said key, it can only beunlocked from the outside by means of said key. To this end I haveprovided means independent of the inside thumb turn and operable fromthe exterior only by a shut-out key or keys. This result is accomplished as follows: The tumbler barrel alt), which is secured to theouter face plate of the lock case, carries two c nicentric rotatingtumbler barrels or sleeves. The inner of these barrels is operable by aseries of keys, such as what I term. a change key, a master key and agrand-imister key, the bitting of these keys being arranged to retract aseries of spring-pressed pin tumblers to permit the barrel to turn in amanner well known in the art. This inner sleeve carries at its endwithin the lock case a. roll-back arm 41-1 provided with abutmentflanges 41 which engage with a pin or stud 42 carried l'iy the end ofthe outer tumbler barrel 41-3 and limiting the movement of the roll-backarm to half a revolution in one direction. This movement is in aclock-wise movement from the position shown in Fig. (5 to that shown inFig. 7 of the drawings and can be imparted to the rollback arm by any ofthe plurality of keys mentionedthat is, the change key, master key andgrand-master key, for example. This movement will bring the end of theroll-back arm in the course of its downward movement against the upperface of an abutment plate 44 carried by the end of the main latch bolt 3and will retract said latch bolt when the dead-locking slide has notbeen projected in the rear thereof. If the dead-locking slide, however,has been projected, these keys cannot retract the main latch bolt. Theshut-out key, however, cooperates with the tumbler barrel and with thepawl 17 carried by the locking slide to retract this slide if projectedand retract the bolt, and to project the slide into locking position tolock the apartment against intrusion from the exterior through theactuation of the knob spindle and the operation of the series of keyshereinbefore mentioned. This is accomplished in the following manner:The shut-out key is so bitted that it cooperates with the spring pressedpin tum blers to free both the inner and outer tumbler barrels andpermit them both to be freely rotated by the key, the stud 4:2 movingwith the roll-back arm a1 and with the end of the outer tumbler barrel43. The rollback arm, therefore, can make a full revolution and is solocated with reference to the pivoted pawl 17 that when rotated in acounterclockwise direction, as indicated in dotted lines in Fig. 8, itsedge will engage the lower portion of the cam face 20 and, when theslide 11 is in projected bolt-locking position, will force said pawlinwardly against the anti-friction roller 16, and by reason of itsbeveled edge 19 contacting therewith, move the pawl and the slide 11upwardly into retracted unlocking positlon, whereupon the key may berotated to turn the roll-back arm 4L1 in the opposite direction to bringits end against the abutment plate 441 and retract the main latch bolt.

hen it is desired to dead-lock the main latch bolt from the outside, theshut-out key is inserted and the roll-back arm 41 and outer tumblerbarrel 43 rotated in a counterclockwise direction, as hereinbeforedescribed. The pawl 17 has been raised with the slide sufliciently to becleared by the end of the roll-back arm 41 as it is rotated, and theturning movement of this arm is continued past this point until its endcontacts with a strike lug 11 formed on the slide 11. A continuedmovement of the roll-back arm will force this lug and its slidedownwardly into locking position, and the roll-back arm may then beturned back to its initial position, the arm striking the under face ofthe pawl 17 during such movement and merely turning it on its pivotwithout actuating the slide. This locking and unlocking operation of thedead-locking slide through the shut-out key and the roll-back arm 41, is

independent of the thumb turn hub 25 which is turned by the movement ofthe slide into the positions it would assume were it actuated from theinterior to accomplish the same result. It will be noted also that evenwhen the shut-out key is used to bring its roll-back arm 41 against thepivoted pawl 17, the dead-locking slide 11 cannot be projected intobolt-locking position when the door is open, as the auxiliary latch willbe projected by the opening ofthe door, rocking the abutment flange intodogging position relative to the flange 28 of the hub 25 and preventingthe movement of the slide 11 and roll-back arm 26 of said hub.

From the foregoing it will be evident that my shut-out key not onlyoperates as a means of shutting out or excluding entrance to theinterior of the apartment except through said key, but also operates asan emergency key which can retract the dead-locking slide 11 when lockedfrom the inside and permit access to the apartment in emergency.

While I have described a specific embodiment of my invention, I desireit to be understood that various changes and modifications of thestructure thereof are still possible within the spirit of the inventionand within the scope of the appended claims.

What I claim, therefore, and desire to secure by Letters Patent is:

1. In a lock in combination, a latch bolt, means whereby said bolt maybe retracted through a knob spindle, means whereby said bolt may beindependently retracted through a key, means operable by a second keywhereby said latch bolt may be dead-locked against retraction by saidknob spindle and said first named key, and whereby said deadlockingmeans may be rendered inoperative and said latch bolt retracted.

2. In a lock in combination, a latch bolt, means whereby said bolt maybe retracted through a knob spindle, means whereby said bolt may beindependently retracted through a key or keys, a movable member adaptedto dead-lock said latchvbolt against retraction by said knob spindle andsaid first named key or keys, and means operable by another key formoving said member into latch bolt locking and unlocking positionwhereby said bolt may be dead-locked by said other key againstretraction through said knob spindle and said first named key or keys,and whereby said bolt may be retracted by said other key.

3. In a lock in combination, a latch bolt, means whereby said boltmay beretracted through a knob spindle, a roll-back arm,

tumbler mechanism cooperating therewith, an exterior key cooperatingwith said tumbler mechanism and said roll-back arm to retract said latchbolt independently of said knob spindle, a movable member adapted to beactuated to dead-lock said latch bolt against retraction through saidknob spindle and said first named exterior key, abutments carried bysaid movable locking member, and means whereby another exterior key maycooperate with said tumbler mechanism and rollback arm to actuate saidarm into cooperative engagement with said. abutments to thereby projectsaid movable member to dead-lock said latch bolt and to retract saidmember from said position and retract said latch bolt.

4. In a lock in combination, a latch bolt, means whereby said bolt maybe retracted through a knob spindle, a tumbler barrel, tumbler mechanismcooperating therewith, a roll-back arm operated through said tumblerbarrel, means whereby an exterior key may cooperate with said tumblermechanism and said tumbler barrel to impart a partial revolution to saidroll-back arm to thereby retractsaid latch bolt independently of saidknob spindle, a movable member adapted to be actuated to dead-lock saidlatch bolt against retraction through said knob spindle and saidexterior key, abutments carried by said movable member located out ofthe path of partial. revolution of said roll-back arm, another exteriorkey cooperating with said tumbler mechanism and said tumbler barrel, andmeans whereby said other exterior key may impart a less restrictedrotation to said roll-back arm to thereby cooperate with said abutmentsto project and retract said movable member into dead-locking and unlocking position and retract said latch bolt.

5. In a lock in combination, a latch bolt, means whereby said bolt maybe retracted through a knob spindle, a plurality of tum bler barrels,tumbler mechanisms cooperating therewith, a roll-ba k arm operatedthrough one of said tumbler barrels, means whereby an exterior key orkeys may cooperate with said tumbler mechanisms and said tumbler barrelto impart a partial revolution to said roll-back arm to thereby retractsaid latch bolt independently of said knob spindle, a locking slideadapted to be actuated to dead-lock said latch bolt against retractionthrough said knob spindle and said exterior key or keys, a pivotedabutment member carried by said sliding member, a second almtu'ientmember carried thereby, both of said abutment members being located outoi the path of partial revolution of said roll-back arm, anotherexterior key cooperating with said tumbler mechanisms and said pluralitI it tumbler barrels, and means whereby other key may impart a lessrestricted rotation to said rollback arm to thereby cooperate with oneof said abutment members to project said sliding member intodead-locking position and cooperate with the other abutment member toretract said sliding member from dead-locking position and retract saidlatch bolt.

6. In a lock in combination, a latch bolt, means whereby said bolt maybe retracted through a knob spindle, means whereby said bolt may beindependently actuated from the exterior through a key, means operablefrom the interior whereby said latch bolt may be dead-locked againstretraction through said knob spindle and said exterior key, and meansoperable through an other exterior key whereby said dead-locking meansmay be operatively and inoperatively positioned independently of saidinterior operating means, and whereby said means may be actuated todead-lock said bolt against said knob spindle and first named exteriorkey, and may be retracted from dead-locking position when so actuate-dfrom the interior.

7. In a lock in combination, a latch bolt, means whereby said bolt maybe retracted through a knob spindle, a rotatable actuating memberadapted to cooperate with said latch bolt, tumbler mechanism cooperatingwith said actuating member, means whereby an exterior key may cooperatewith said tumbler mechanism and actuating member to partially rotatesaid member to retract said latch bolt independently of said knobspindle, a movable member adapted 'to be actuated to dead-lock saidlatch bolt against retraction through said knob spindle and saidexterior key, means operable only from the interior for actuating saidmember, abutments carried by said member located out of the line ofpartial rotation of said rotatable actuating member, another exteriorkey cooperating with said tumbler mecha nism and said rotatableactuating member, and means whereby said other key may impart a lessrestricted rotation to said actuating member and thereby engage anabutment and retract said movable member from dead-locking positionindependently of said interior actuating means and retract said latchbolt, and whereby said rotatable actuating member may engage an abutmentto actuate said movable locking member and dead-lock said latch boltagainst retraction through said knob spindle and said first namedexterior key.

8. In a lock in combination, a main latch bolt, means whereby said mainlatch bolt may be retracted through a knob spindle, means whereby saidbolt may be independently retracted by a key, a movable member adaptedto lock said main latch bolt against retraction by said knob spindleand. said key, means whereby said member may be actuated from eitherside of said door to operative and inoperative position, a normallyprojected auxiliary latch bolt retracted when said door is closed, andmeans actuated by said auxiliary latch bolt when the door is opened andsaid bolt projected whereby said movable member is held against boltlocking movement.

9. In a lock in combination, a main latch bolt, means whereby said boltmay be retracted through a knob spindle, means whereby said bolt may beindependently retracted by an exterior key, a dead locking slide adaptedto be moved to lock said main latch bolt' against retraction by saidknob spindle and said exterior key, means operable from the interior ofthe door for operatively and inoperatively positioning said slide, meanswhereby another exterior key auxiliary latch bolt retracted when saiddoor may independently so position said slide, an is closed andprojected when said door is opened, and means operated by the projectionthereof when the door is opened preventing the operation of said slideto deadlock said main latch bolt.

10. In a lock, in combination, a latch bolt, means whereby said bolt maybe retracted through a knob spindle, means whereby said bolt may beindependently actuated from the exterior through a key, means operablefrom the interior whereby said latch bolt may be dead-locked againstretraction through said knob spindle and said exterior key, indicatingmeans on the exterior operatively positioned by dead-locking movement ofsaid interior operating means and means operable through anotherexterior key whereby said dead-locking means may be operatively andinoperatively positioned independently of said interior operating meansand whereby said means may be actuated to dead-lock said bolt againstsaid knob spindle and first named exterior key, and may be retractedfrom dead-locking position when so actuated from the interior.

AUGUST ARENS.

Witnesses:

C. A. SEELYE, C. A. PARKER.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Iatents, Washington, D. C.

It is hereby certified that in Letters Patent No. 1,070,098, grantedAugust 12, 1913, upon the application of August Arens, of New Britain,Connecticut, for an improvement in Locks, an error appears in theprinted specification requiring correction as follows: Page 5, transposelines 16 and 17; and that the said Letters Patent should be read Withthis correction therein that the same may conform to the record of thecase in the Patent Oflice.

Signed and sealed this 23d day of September, A. D., 1913.

[SEAL] R. T. FRAZIER,

Acting Commissioner of Patents.

